Dump truck body



Nov. 24, 1942.

R. E. ELLIQTT DUMP TRUCK BODY Filed oct. 1a, 1941 5 Sheets-Sheet 2 JzEEZzio Nav. .24, i942.

R. E. ELLlo'rT DUMP TRUCK BODY Filed Oct. 18, 1941 3 Sheets-Sheet 3 gmc/nm Patented Nov. 24, 1942 DUMP TRUCK BODY Roy Edgar Elliott, Fabens, Tex., assignor of onehalf to William L. Summers, El Paso, Tex.

Application october 1s, 1941, sensi No. 415,619

`(c1. zas-zz) 3 Claims.

The invention aims to improve upon the bodies of dump trucks in a novel manner which permits the load to be spread in a layer of desiredthickness when dumping same, instead of dumping said load in one pile as now customary, and the invention further aims to make provision whereby unusually large rocks, large lpieces of concrete, stumps, etc. may be given ample room to discharge from the dump body without the necessity of removing the usual pivotally suspended Vrearwardly swingable tall-gate. v

A still further object is to provide a construction which may be expeditiously operated. by hydraulic means suitably connected with the usual pump and reservoir of the hydraulic lift of the dump truck body if such ka hydraulic lift be employed on the truck.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawings.

Fig. 1 is a bottom view of a dump truck body including the improvements, the upper rear portion of the view being partly in horizontalsection. v

Fig. 2 is a rear elevation with the tail-gate removed.

`lllg. 3 is a horizontal sectional view on line 3-3 of Fig. 2.

Fig. 4 is a vertical longitudinal sectional view on line I-I of Fig. l, the slidable bottom section of the body being in closed position.

Fig. 5 is a fragmentary view similar to the rear portion of Fig. 4 but illustrating the body in a dumping position and illustrating the slidable bottom section partly opened.

Flg. 6 is an enlarged detail vertical section on line 6-6 of Fig. 5. f

A preferred construction has been illustrated and will be specifically described, with the understanding, however, that within the scope of the invention as claimed, variations may be made.

'I'he base frame III of the body II includes two parallel longitudinal side bars I2 and a pluralityV of transverse bars extending between and secured to said side bars, one of said transverse bars being shown at I 3, spaced forwardly fromthe rear ends of the side bars I2, and anotherof said transverse bars being shown at Il, in advance of the `bar Il. All of the bars I2, I3 and Il are preferably metal channels and for later reference, the upper and lower inwardly projecting flanges of the side bars I2 are denoted at I5 and I6, respectively. The bars I3 and Il are secured upon two longivided with suitable latch means (not shown).

tudinal sills I1 which rest upon the side bars of the truck chassis frame I8, said sills having downwardly projecting brackets I9 at their rear ends which are pivoted at 20 to .said chassis frame to permit the body Il to be tilted to a dumping position under the iniluence of a hydraulic lift orthe like 2|.

The body II Vincludes the usual metal bottom 22, side walls 23, front end wall 2l, and pivotally suspeniied rearwardly swingable tail-gate 25 pro- A notch 26, almost as wide as the bottom 22, is formed in the rear end of said bottom and extends entirely to the tail-gate 25, the longitudinal edges 21 of said notch being inwardly spaced from the sidewalls 22k to leave flange-like portions 28 of the bottom, projecting inwardly from said side walls as shown more particularly in Figs. 2 and 6. The front-l edge wall 29 of the notch 26 may well be substantially midway between the rear end of the bottom 22 and the transverse bar Il. While the bottom 22 is secured upon the top anges' I5 of the side bars I2, the rear portions of these flanges are cut away substantially from the bar I3 to the rear extremities of said side bars I2, thereby downwardly exposing the lower sides of the ange-like bottom portions 2l and the lower sides of the bottom portions of the body in advance of the notch 29. This is done to accommodate a slidable bottom section 30 which is provided to normally close the notch 26, said section 30 being in slidable contact with the lower side of the bottom 22 and its ilangelike portions 28. This bottom section 30 is of l rectangular form and is provided with a suitable carrying frame Il, said frame having rollers or other supporting shoes 32 at its ends. To support these rollers or shoes, longitudinal tracks 3l, preferably of angle metal, are secured to the side bars I2 in upwardly spaced relation with their lower flanges I6.

The supporting frame 3i of the slidable bottom section 30 is connected by two links 34 with two arms 35 on the end portions of a transverse rock shaft 36 which extends between and is suitably supported by the side bars I2, said rock shaft being provided between its ends with a third arm 31 which is operatively connected with the'piston rod 38 of a hydraulic cylinder and piston assembly 39, this assembly being mounted at l0 upon the transversebar Il. By operating the assembly 39, the rock shaft 36 may be turnedV to open and close the slidable bottom section 30, as will be clear from a comparison of Figs. 4 and 5.

The fluid for operating the assembly 39 may well be moved by the conventional motor-driven pump which actuates the hydraulic lift 2|, and a controlling valve may be provided in the cab of the truck, and it will be seen that said assembly 39 will require no additional fluid reservoir, the reservoir already provided for the hydraulic lift 2| being sulcient.

By opening the slidable bottom section 30 to the required extent, with or without the tail-gate 2-5 opened, the material being dumped from the body may be spread ln a layer of desired thickness. Whenever unloading large rocks, pieces of concrete, stumps or the like which will not pass under the usual pivotal suspending means of the tail-gate 25, thebottom section 30 maybe slid forwardly to the maximum, thus providing a greater space through which the rock or the like may discharge. It will thus be seen that the improved dump body herein disclosed possesses marked advantages over conventional dump bodies heretofore employed.

While preferred structural features have been illustrated, attention is again invited to the pos sibility of making variations within the scope of the invention as claimed.

I claim:

as said bottom, said notch having two longitudinal edges spaced inwardly from said side walls leaving flange-like portions of said bottom projecting inwardly from the lower edges of said side walls, a slidable rectangular bottom section normally closing said notch and contacting slidably with the lower side of. said bottom, said bottom l. In a pump truck body, a horizontal base y frame including two longitudinal side bars and transverse bars extending between and secured to said side bars, a bottom secured upon said longitudinal and transverse bars, the rearv end'of said bottom being provided with a notch,`a slidable bottom section normally closing said notch, means mounting said bottom section on said side bars, a transverse rock shaft mounted on said base frame in advance of said bottom section and having two arms near its ends and a third arm between its ends, a cylinder and piston assembly mounted on one of said transverse bars and connected with said third arm for turning said rock shaft, and links connecting said two arms with said bottom section for operating the same.

2. A dump truck body comprising a horizontal base frame including two longitudinal side bars each having an upper and a lower inwardly projecting longitudinal flange, a bottom, side walls projecting upwardly from said bottom, and a tailgate cooperable with said bottom and side walls, said bottom being secured upon the two upper flanges of said side bars and having a notch opening through its rear end and almost as wide section having a front edge slightly in advance oi said notch and having end portions slidably contacting with the lower sides of said flange-like portions of said bottom, supporting shoes on said end portions of said bottom section, two longitudinal tracks supporting said shoes and secured to the inner sides of said side bars above said lower flanges thereof, and means for sliding said bottom Vsection forwardly to permit discharge of material through said notch with said tail-gate either open or closed.

3. A dump truck body comprising a horizontal base lframe including two longitudinal side bars each having an upper and a lower inwardly projecting longitudinal flange, a bottom, side walls projecting upwardly from said bottom, and a tailgate cooperable with said bottom and side walls.V

said bottom being secured upon the two upper flanges ofsaid side bars and having a notch opening through its rear end and almost as wide as said bottom.,said notch having two longitudinal edges spaced inwardly from said side walls leaving iiange-like portions of said bottom projecting inwardly from the lower edges of said side walls, the upper flanges of said side bars being cut of! from the rear extremities of said side bars to points in advance of said notch, exposing the lower vsides of said flange-like portions and the lower sides of the portions of said bottom in advance of said flange-like portions, a slidable rectangular bottom section normallyl closing said notch and contacting slidably with the lower side of said bottom, said bottom section having a front edge slightly in advance of said notch and having end portions slidably contacting with said exposed lower sides of said flange-like portions, supporting shoes on said end portions of said bottom section, two longitudinal tracks supporting said shoes and secured to the inner sides of said side bars above said lower flanges, and means for sliding said bottom section forwardly to permit discharge of material through said notch with said tail-gate either open or closed.

. EDGAR ELLIOTT. 

